How to add a new audio (not mixing) into a video using ffmpeg?

I used a command like:

ffmpeg -i video.avi -i audio.mp3 -vcodec codec -acodec codec output_video.avi -newaudio

in latest version for adding new audio track to video (not mix).

But I updated the ffmpeg to the newest version (ffmpeg version git-2012-06-16-809d71d) and now in this version the parameter -newaudio doesn’t work.

Tell me please how I can add new audio to my video (not mix) using ffmpeg.